4393506 has 64 divisors (see below), whose sum is σ = 10321920. Its totient is φ = 1235520.

The previous prime is 4393489. The next prime is 4393507. The reversal of 4393506 is 6053934.

It is a happy number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4393507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55575 + ... + 55653.

It is an arithmetic number, because the mean of its divisors is an integer number (161280).

Almost surely, 2^4393506 is an apocalyptic number.

4393506 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 4393506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5160960).

4393506 is an abundant number, since it is smaller than the sum of its proper divisors (5928414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4393506 is a wasteful number, since it uses less digits than its factorization.

4393506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 4393506 is about 2096.0691782477. The cubic root of 4393506 is about 163.7835981794.

The spelling of 4393506 in words is "four million, three hundred ninety-three thousand, five hundred six".